Titans wide receiver Kevin Walter is still recovering from back surgery, and is unlikely to be ready by the start of the regular season. As a result, Walter is expected to remain on the PUP list at the start of the regular season, according to The Tennessean.

"It looked like he was actually getting better and it didn't get better, and then he obviously went and had surgery," Munchak said. "Until he starts running around, which he's not doing, it’s hard to tell when he’ll be healthy."

Walter is making gradual progress, but will likely have to sit out the first six games of the season. Walters finished the 2012 season with 41 catches for 518 yards and a pair of touchdowns.

The Titans will keep the following players on the physically unable to perform list for at least another week, reports the Tennessean: receiver Kevin Walter (knee), tight end Delanie Walker (knee) and safety Robert Johnson (foot).

All three will not play against the Bengals in the second preseason game.

Walter, formerly with the Texans, didn't practice during June OTAs because of his back. He's since had surgery to repair a disk. Coach Mike Munchak said he expects Walter to miss four or five weeks, putting his availability for the start of the season into some doubt.